Preheat the oven to 375°F (190°C). Bake the frozen breaded chicken tenders according to package directions until heated through and crispy.
Slice the Hawaiian roll loaf horizontally in half. Grease a 9 x 13-inch baking pan and place the bottom half of the rolls in the pan.
Arrange the cooked chicken tenders evenly over the bottom half of the rolls.
Spoon 1 to 1½ cups marinara sauce over the chicken tenders, then top with 6–8 slices of mozzarella so the cheese covers the chicken.
Place the top half of the roll loaf over the layered chicken, sauce, and cheese.
Stir the melted butter with the garlic powder, then brush the garlic butter evenly over the top of the rolls.
Sprinkle the grated Parmesan evenly over the buttered top, tent the pan with foil, and bake for 20–25 minutes until heated through and the cheese is melted.
Remove from the oven, sprinkle with the minced fresh basil, slice into individual sliders, and serve warm.